The marginal cost function $of$ producing $q$ mountain bikes $is$

$C^{\text{'}}(q)=\frac{15q+600}{0\mathrm{.}3q+5}$

$(a)If$ the fixed cost $in$ producing the bicycles $is$ $$2400,$ find the total cost $to$ produce $30$ bicycles.

Round your answer $to$ two decimal places.

$

$(b)If$ the bikes are sold for $$210$ each, what $is$ the profit $(or$ loss$)on$ the first $30$ bicycles?

Round your answer $to$ two decimal places.

$

$i$

$||$

$(c)$ Find the marginal profit $on$ the ${31}^{st}$ bicycle.

Round your answer $to$ two decimal places.